Reciprocating-flat-bed web-printing machine.



'.W. T. FLETCHER.

REGIPIIOGAIING PLAT BBD WBB PRINTING MACHINE.

APPLIUATIONPILBD'APBJO.1912.' A 1,094,386. Patented Apr..21,1914. 1

` WILLIAM T. FLETCHER, or BELFAST, IRELAND.

RECIPROGATING-FLAT-BED WEB-PRINTING MACHINE.

Specification of Letters Patent.

. Appiicationieaapniao,1912.' lseriai No. 692,115. i i

Patented Apr.. 21, 1914.

To all-whom imag concern: v

Be it known that I, WILLIAM THOMAS Fin'roiinn,

of Great Britain and Ireland, whose'postoilice address is 58 Brookvale4 avenue, Ani4 trim Road, Belfast, inthe county of Ai'itrim, Ireland, h`ve `invented a fnew Model of i. Printing- Machinefviz., f a Reciprocating,

' Flat-Bed` Web-Printing Machineof which ,i

` L therewith.

the following'. is.l a; S-pecImation.,.v` u l The l@bien 'or this. invention is i6 print onfonefor. botlisides ofa continuouspweb of paper from fiaty forms and atl-a s eed Y lquicker thancan be attained .15

, by' 'fee ing separatesheets 'of paper into a machine.

" The nature fof the invention is to stillire- .tain the... flat reciprocating. bed commonly used on'fprinti-ng machines, buttoy substitute .for the single cylinder in general use, a set print on of. four cylinders sothat the machine shall both strokes vof theg'bed, firstby f fone pair of cylinders and thenl the other pair.' The simultaneously,

cylinders are adapted to work in pairs. to permit. two pages to be printe'd thus the .travel of,` the bed is reduced by one half andthe speed in# creased. i i

The accompanying drawingis a vertical elevation of the entire machine, showing' one. side frame removed for convenience of illustrating the bed-motion land method of` gear-,

ing the cylinders.. f

The snowing ,demise i descripfiiihas. reference tothe drawing and will show h ovvf, i

" l* y four cylinders with one flat reciprocating I attain these objects :if j

Two'impression'cyl' ders (Aand Eyre-.1

4volving continuously in theone directionarearrangedin Ijuxtaposition to print 'on one y side of'a continuous web of paper (E) from. forms'arranged in four` sets-of two, three, 'for lfour[according tothe number of pages "tobe printed on'a flat/.reciprocating form` bdtF) on the outward stroke., The second cylinder (B) prints on that ortion of the web missed by the first cylin ery (A) on the backward vstroke of the vform-hed'.

-And two impression cylinders (C and Il) revolving continuously in the one direction,-

but lo posits direction to said two previous' cylin ersfare arranged in juxtaposition to print on one'side of said continuous web of paper (the 'reverse 'side of `web mentioned in previous paragraph, and. thus perfect) from the same dat reciprocating bed on the backward stroke.y The second cylinder (D.)

prints on that portie-n of the web missed by a citizen ofthe UnitedKingdom f the first cylinder (C) on the outward stroke of the form-bed.

forni y.passes beneath the smaller radius of the cylinderV Without. coming into contact f The-pinion on the central siaft is adapted ,to 'engage alternately withv an" upper and fa .lover rack on the bed to reciprocate. thev same,l and vthelcylinders are continuouslyrovtate'd by a train of gearing .connected with sai-dcentral shaft..y The bedis reversed in cylinder machines.' l f V, A

Between the cylinders laindraised above them lare carrying rollers, these servingv toA deliver the web from onecylinder to an- To' permit of the backward stroke of the form all the cylinders are of two radii. i The 'half' of the periphery used" for lthe impres-` g sion having-a greaterfradiiigfthan the other. half, On the return 'stroke ofthey bed the the usual well known manner'of bed' and other in such a position that the portions l missed bythe cylinder A o'r C. arezprinted bythe cylinders B. or D. respectively. j

no forms on that side of the machine.

4I am aware that 'prior to my invention {iat-bed web-fed printing ymachines have been Infieldl I therefore do not .claim such a combination broadly, but

I claimf-.ff

' 1;. In a printing A.press the combination of forni bed having four sets of forms thereon Vio-acting with said cylinders, each cylinder foo-,acting with a singleset of forms, means for rotating the cylinderscontiiiuously, two

of said cylinders in the direction of-A the forwardl stroke of the form-bed and the other two cylinders in the direction of the return stroke of the forni-bed, both cylinders and bed operated from a central shaft, the cylinders operating to print on both sides of a continuous web and said cylinders also operating to feed the web continuously between the bed and cylinders both during the forward and return strokes of the form-bed.

2. In a. printing press the combination oftwo pairs of cylinders with one fiat reciprocating form bed having four sets of forms thereon, each cylinder coacting with a single set of forms, the cylinders of each pair roto the cylinders of the `other pair, each of When only one side `is to* be printed the 80 first two cylinders are used, the paper trav-. ersing lthe other cylinders, there being -then ias tating in the samedirectionfand oppositely i rbed and also provide said cylinders being provided with kan impression surface of one radius for coaction With its set of forms on one stroke of said A d with a non-impression surface of a less radius to avoid engagement with said bed on the opposite stroke thereof,'

@means for rotating sald cylinders continuously said cylinders and bed being operated Sironi acent-ral shafti said impression suropies of this patent may be obtained f or ve cents each', by addressi Washington, D.' C.

' faes coperating With said form bed to 1G prlnt on bth sides of a continuous web and said cylinders also operatingvto feed thefV web continuouslybetween the bed and-cyl- THOMAS BUTRDEN.

JOHN Conn.

ng the Commissioner of Patent: 

